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. 2022:114:71-90.
doi: 10.1007/978-3-030-93306-7_3.

Insights into Microsporidia Evolution from Early Diverging Microsporidia

Daniele Corsaro  1
Affiliations

Insights into Microsporidia Evolution from Early Diverging Microsporidia

Daniele Corsaro. Exp Suppl. 2022.

Abstract

Microsporidia have drastically modified genomes and cytology resulting from their high level of adaptation to intracytoplasmic parasitism. Their origins, which had long remained enigmatic, were placed within the line of Rozella, a primitive endoparasitic chytrid. These origins became more and more refined with the discovery of various parasites morphologically similar to the primitive lines of microsporidia (Metchnikovellids and Chytridiopsids) but which possess fungal-like genomes and functional mitochondria. These various parasites turn out to be distinct missing links between a large assemblage of chytrid-like rozellids and the true microsporidians, which are actually a very evolved branch of the rozellids themselves. The question of how to consider the historically known Microsporidia and the various microsporidia-like organisms within paraphyletic rozellids is discussed.

Keywords: Chytridiopsids; Early microsporidians; Metchnikovellids; Mitosporidium; Morellospora; Nucleophaga; Paramicrosporidium; Rozellomycota.

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